Atomization patterns and breakup characteristics of liquid sheets formed by two impinging jets

Jun, Dong Suk; Chen, Xiao; Khare, Prashant; Yang, Vigor

doi:10.2514/6.2011-97

Cited by 30 publications

(14 citation statements)

References 19 publications

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“…Length and width of the power-law sheet are discussed for jet velocity of 22.9 m/s at different impinging semiangles. Figure 14 shows the dimensionless length and width in equation (17) with the impinging semiangles.…”

Section: Results Of Linear Instability Analysismentioning

confidence: 99%

“…As to numerical analysis of the impinging atomization. Simulations for power-law gels were implemented using volume of fluid model and adaptive mesh refinement by Chen et al 16 and Ma et al 17 revealing a high fidelity from perspective of spray behavior and breakup length. Han et al 18 applied smoothed particle hydrodynamics method to the simulation assuming gel propellants to be highly viscous Newtonian fluids.…”

Section: Introductionmentioning

confidence: 99%

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A simplified linear model and breakup characteristics of power-law sheet formed by a doublet impinging injector

Deng

Zhuo

Feng

2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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Instability of impinging sheet is analyzed for power-law fluid by solving dispersion equations deduced based on a simplified linear model under anti-symmetric and symmetric disturbances in present work. An impinging atomization platform is established, and experiments for gelled power-law simulant are accomplished. A comparative analysis between experimental and linear results is conducted. Relative conclusions indicate that anti-symmetric disturbance is superior to symmetric disturbance in instability of the sheet. Increasing sheet velocity or decreasing sheet thickness can accelerate instability, but the disturbance of sheet is suppressed by promoting consistency and flow index. Experimental impinging sheets are divided into four modes and their distributions are also identified. Besides, spray angle increases, but breakup length and dominant wavelength decrease with increasing jet velocity and impinging angle. By comparison, experimental breakup lengths of 75° impinging angle relatively accord with theoretical ones. Theoretical breakup lengths are lower than experiments at lower sheet velocity but have an opposite trend at higher sheet velocity when impinging angle is 90°. As to dominant wavelengths, linear analysis shows an acceptable overestimation compared to experiment. In spite of some discrepancies, linear analysis developed at present can be used to predict the breakup characteristics of gelled power-law sheet.

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Section: Results Of Linear Instability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A simplified linear model and breakup characteristics of power-law sheet formed by a doublet impinging injector

Deng

Zhuo

Feng

2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Further, the code is parallelized based on message passing interface libraries for massively parallel computations. This framework has been used extensively for a wide range of multiphase flow problems, including liquid jet atomization in the presence of broadband inlet fluctuations, impinging liquid jets, droplet breakup, and collision phenomena [29,49,50,51].…”

Section: Governing Equationsmentioning

confidence: 99%

Binary collision of CMAS droplets—Part I: Equal-sized droplets

2020

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“…The effect of impact wave on mixing process of both miscible and immiscible impinging jets is also addressed. Dong-Jun Ma et al [14] performed a high fidelity numerical simulations to study the atomization patterns and breakup characteristics of liquid sheets formed by two impinging jets. A fully threedimensional Volume-of-Fluid method is used with the adaptive mesh refinement (AMR) based on octree meshes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Atomization Process of a Like-doublet Impinging Rocket Injector

Zheng

Nie

Feng

et al. 2015

Procedia Engineering

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A numerical simulation is conducted to characterize the atomization process of like-doublet injector with two different impingement angles. Using the coupled Level-Set/Volume-of-Fluid (CLSVOF) method for capturing the liquid/gas interfaces, liquid sheet characteristics were efficiently captured, and the simulations were found to agree well with experiment results for both breakup characteristics and Sauter Mean Diameter (D 32 ). This method combines the mass conservation properties of the volume-of-fluid method with the accurate surface reconstruction properties of the Level-Set method for a 3D atomization process simulation of the like-doublet injector. Since the velocity profiles around the stagnation point and impingement point greatly affects the sheet characteristics, the velocity profiles of different axial locations on the cross section for two different impingement angles cases are studied. It shows that the velocity difference caused by the impact of liquid jets is one of the important factors which directly affect the formation of surface wave and the breakup of sheet

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Atomization patterns and breakup characteristics of liquid sheets formed by two impinging jets

Cited by 30 publications

References 19 publications

A simplified linear model and breakup characteristics of power-law sheet formed by a doublet impinging injector

A simplified linear model and breakup characteristics of power-law sheet formed by a doublet impinging injector

Binary collision of CMAS droplets—Part I: Equal-sized droplets

Numerical Simulation of the Atomization Process of a Like-doublet Impinging Rocket Injector

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